A heartbroken Brooklyn father told a jury yesterday how he rushed from his home to a nearby park, only to see his worst nightmare – his 15-year-old son slowly bleeding to death on the ground.

“I observed my son lying on his stomach with two bullet holes in his back,” said Larry Hill Sr. “He said, ‘Daddy, it hurts.’ ”

Prosecutors believe accused killer Anthony Hernandez, 22, was trying to show the boy, Larry Hill Jr., who was boss after the teen had exchanged words with a female friend of Hernandez’s in Highland Park in Cypress Hills in July 2004.

“I’m tired of all you [expletives] in my neighborhood,” Hernandez, a Crips gang member, allegedly screamed as he fired one shot in the air.